{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373103",
    "entityType": "User",
    "nonce": "0x7e452e329b4f7587fba6589ef99b8b628766a020cdae572468de0eaceb27db05",
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    "signer": "0xB874f4621c8c59121feacEaD49e379Baa95ebC5b",
    "userId": "480497000"
  }
}